A major French union has warned Paris that the upcoming Euro 2016 soccer tournament opening could be disrupted unless it backs down on contested labor law reforms. It comes as tens of thousands of people hit the streets again to protest the legislation.

The warning on Thursday by the hardline CGT union took aim at the 2016 UEFA European Championship (known as Euro 2016), scheduled to begin in France on June 10. The match will be played at various stadiums throughout the country, including Bordeaux, Lyon, Marseille, Nice, and Paris.

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But if the CGT has its way, those games will only be taking place if Paris agrees to back down on a highly contested labor law reform.

When asked by Reuters if his union was willing to disrupt the football contest, CGT chief Philippe Martinez said: “The government has the time to say ‘let’s stop the clock’ and everything will be ok.”

Those thoughts were echoed by the head of the smaller FO union, Jean-Claude Mailly, who said: “In football speak, it’s time the prime minister took the red card back.”